Since 2016, no international domain name are being used by Yahoo.
If you're using an AT&T email domain (att.com domain name and the rest is now Internet history! Enter your complete Frontier email address and password. IPs or domains listed on these blocklists may result in some of your email being marked as spam. Add the alternate address to Yahoo! Mail. It’s unlikely that you’d need more, but Yahoo doesn’t provide any extra storage options even if you did. Whitelisting email addresses in Yahoo Mail is easy using Yahoo Mails filters.Ask your registrar to change your name servers to your new Yahoo Small Business settings. According to Wikipedia, an email blacklist is a database with email addresses, domains, or IP addresses that mail service providers and some respectful third-party services consider “bad.
